Crown Castle International Corp. operates as a real estate investment trust, which engages in the provision of shared wireless infrastructure solutions. It operates through the following segments: Tower, and Small Cell. The Tower segment provides access, including space or capacity towers dispersed throughout the U.S. This segment also reflects certain network services relating to the company's towers, consisting of site development services and installation services. The Small Cells segment provides access, including space or capacity of fiber primarily supporting small cell networks. This segment also offers fiber based solutions. The company was founded by Ted B. Miller Jr. and Edward C. Hutcheson Jr. in 1994 and is headquartered in Houston, TX.